Each pair of sister cities has its own unique bond, but here are some of our personal favorites:

Charleston, South Carolina and Spoleto, Italy

These two cities love (yes, love) each other so much that they created an annual festival together, known as the Spoleto Festival USA. The festival takes place in Charleston and runs for 17 days and nights, bringing the sister cities together though art, dance and music. Go for the Spoleto Fest, and stay for the Hominy Grill, shopping on King Street and sweet tea!

Santa Barbara and Puerto Vallarta are a sisterly beachgoer's dream. With their endless amounts of sunshine, both cities offer gorgeous beaches, awesome whale watching (Puerto Vallarta has a "photo safari!") and pretty weather all year long. We honestly can't think of a better, sandier partnership out there (besides piña coladas and tanning, of course).

Salisbury, Maryland and Tartu, Estonia

This duo has initiated an exchange program for college students studying cybersecurity. While we don't know much about coding, we're definitely down to visit the exotic island off of Estonia to try some of their delicious cuisine or take a trip to one of countless Estonian national parks.